Rotary pump.



J. T. SEAMAN.

ROTARY PUMP.

APPLIcATIoN FILED JUNI: 27. 1911.

1,01 9,995. Patented Mar. 12, 1912.

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J. T. SBAMAN.

ROTARY PUMP. APPLICATION FILED JUNE Z7. 1911. 1,01 9,995, Patented Mar. 12,1912.

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@nm/nto@ J. T. SEAMAN. ROTARY PUMP. APPLICATION I'ILED 111111127, 1911.

1,019,995. Patented Mar. 12, 1912.

3y S HEBTS--S HEBT MAN, vresiding at Seattle, in the county of JOHN THORSEN SEAMAN, 0F SEATTLE, WASHINGTON.

ROTARY PUMP.

To all whom it may concern: e

Be it known that I, JOHN THoRsEN SEA- King and State of Washington, have invented a new and useful Rotary Pump, of which the following/is a specification.

My invention relates to that class of rottary pum s which are adapted for causing fluids to ow in and through conduits, but

,more particularly it relates to rotary pumps vwhich shall -be efficient in the operation of sucking or forcing air or water or both air and waterl through pipes when such fluids contain and lcarry in suspension pieces or particles of foreign or dlrty solid matter; and the objects of my invention are to provide pumps which, first, shall have a large capacity in proportion to their weight, second, shall be economically elfective in their operation, third, which shall be so constructed that their wearing parts readily may be renewed, fourth, shall be strong and durable and, fifth, which can-be manufactured at a much smaller cost than other rotary pumps of like capacity that have been employed heretofore. I attain these objects by constructing and combining devices in accordance with plans illustrated by the accompanying drawings in whichf Figure 1 shows my invention by an end` view in elevation at broken line e-z of Fig. 2 with the head-plate ofthe cylinder removed. Fig. 2 is a plan view of same in longitudinal section on line w--w of Fig. 1. Fig. 3 is a View in elevation\and partly in cross-section of parts of the same on lines y-y of Fig. 2. I Fig. 4 is a view in crosssection on line w-w of Fig. 2 of some of the parts of my invention which view is enlarged. Fig. 5 is a reduced perspective view of another part of same. F1 6 is an end view in elevation and Fig. 7 1s a plan view of another detail of same. Fig. 8 is a plan view of some parts of the same. l Fig. 9 is an end elevation showing the relative positionof parts of my invention on line z-z of Fig. 2. Fig. 10 and Fig. 11 are perspective views of details of my invention. l

Like reference numbers indicate like parts throu hout the drawings.

Refrring to Fig. 1, 2O is a cylinder, preferably of cast iron, provided with a fixed head 21 on one end, aninlet 22, an outlet 23 and supports 12 all of which are shown as being cast in one piece. lnlet 22is con- Specication of Letters Patent.

Application tiled June 27, 1911.

Serial No. 635,693.

nected with a conducting pipe 14 while -outlet 23 connects with a siml ar pipe 15..

-16 is a rctor, preferably made of castv bronze and of the form of a hollow cylinder .cylinder 20 while its periphery, in its rotation, is very nearly touching orperhaps may be actually in light contact with the inside of cylinder 2O at a line located (as shown in Fig. l) at the central point between inlet 22 and outlet 23 whereby no by-path may exist at such line for the passage of fluid. V

The length of rotor 16 at its periphery is equal to the length of the boring of cylinder 20 lus the depth lto which the head end of sai rotor 16 projects snugly into the recess 19 in the inner side of fixed cylinder `head 21; that is to say, its length is equal to the distance between cylinder heads 21 and 13 plus the depth of recess 19 whereby practically no Huid can find free passage-way between the ends of rotor 16 and cylinder heads 21 and 13. The rotor 16 is securely attached to the end of a driving shaft 17, as more clearly shown in Fig. 5, which shaft 17 is disposed within, extends through and projects outwardly from, a `'sleeve bearing 18 which is secured to and supported by the fixed cylinder head 21-as indicated in Fig.

`2. The s aid bearing 18 is so disposed in the fixed cylinder head 21 that the rotor 16 may rotate in the constant position which is eccentric with the circumference of the boring of vcylinder 20, as shown in Fig. 1, whereby, when the head 13 is fastened in its place, alliiuid passingfrom inlet 22 to outlet 23 mut find passage through the crescent shaped space 'around the periphery of rotor 16.

Carried by and within the rotor 16, guided and supported by the sides o-f the openings 25, is a pump-Hi ht or vane 26 of suitable material but pre erably of metal havinga low specific gravity, whose form is shown by Figs. 6 and 7.

The -vane 26 is of a width equal to the distance between the cylinder heads 13 and 21 and, as shown in Fig. l and in Fig. 9,

Patented Mar. 12, 19112.v

its within openings 25 of the rotor 16 to adapt it to move and slide' insaid open`ings 25 in either direction acrossthe aXis of rotor 16. Ea@ end of vane 26 isslotted to a depth suitable or receiving and carrying a roller 27 made of suitable material as, for instance..

hard rubber, which is of a lengthequal to the distance between heads 13 and 21 and Whose diameter permits it to roll freely in the slot of the vane 26.

Numerous holes 28 are provided in the vane 26 to lighten its weight and in its enlarged central portion, at right angles to its length, is an elongated hole 31 whose sides are parallel and whose Width adapts it to receive and freely it a roller 29, of suitable material, which roller 29 is mounted to rotate on stud 3'0. which stud 30 is secured in the cylinder'.v head 13 to project 'into cylinder 20 in a position concentric with the boring of said cylinder 2O whereby, when head 13 isV fastened in its place, as shown in Fig. 2, both ends of vane 26.shallat all times and at all circumferential positions of rotor 16, be equi-distant from the vwalls ofcylinder 20 as shown in Figs. 1 and 9.

Thus, by reason of the'action of roller 29, when rotor 1 6 is in motion, at all instants of time, one end of vane 26 is exactly the same distance from the wall of cylinder 20 -as 'its other end is while such distance Will constantly vary during each revolution of rotor 16 by reason of the action on vane 26 by the sides of openings 25.v

The stud 30 is provided with a lubricat- 1 ing duct 32 leading from a grease-cup 33 to lubricating holes 34 whereby greaseor oil may'fnd access to thebearing surfaces of roller 29 and stud A30 as shown in Fig. 2.

By my invention, constructed as thus far described, when rotary motion is communicated through shaft l17 yto rotor 16H11 the direction indicated b'y/the arrow in Fig. 1

' and in Fig. 9 centrifugal force causes rollers 27 i to'hug the walls of the boring cylinder 20, as' indicated by brokenlines in Fig. 1,

@throughout each revolution of rotor 16 l29 on the stud 30.

whereby fluid may beconstantly sucked into the crescent shaped' space through "inlet 22 and `be constantly forced out ofsuch space through outlet 23 by reason of vane 26 as it is carried by rotor 16 and guided by4 roller My invention when constructed. as described thusfar |has'a very high degree of leilicienc formIl o liquid as, for instance, water, but'. when a gaseous Huid like air is to be when the Huid. pumped is of the pumped, then such form of device requires lthe-'following additional features in order l that the same high efficiency may be realized.

In the cylinder head 13 is a hole 35 into which leads a pipe 36 for conductmg water as shown in Fig.v 2;V .A .valvevor cock 37 may control the flow of water, from a source such V37, a connecting rod 39 extending of supply not shown, through pipe 36 into the cylinder 20.

With such devices added, a pump of the form described becomes of the highest etliciency for pumping air or other gaseous fluids.

In its operation rotary mot-ion is communicated through shaft17 to rotor 16 and thereupon cock 37 may beturned to `admit then be put in operation nearly a perfect vacuum would speedily be attained within chamber. Obviously if pieces of foreign matter were drawn into the cylinder 20 such pieces would mix with the water and be immediately ejected through outlet 23 and if Such pieces fail to move as fast as t-he vane 26 then the rollers 27 would simply roll over them till they could be ejected.

Inorder that the pump may be started and stopped without manually turning the water cock 37 I have devised automatic means for controlling said cock 37 which means comprise devices associated with the drivlng shaft of the pump and the water cock 37 whereby when motive power is ap plied to the pump such power incidentally opens cock 37 before the shaft 17 commences to rotate and such cock 37 incidentally closes upon interruption of such power..

Referring to Fig. 2 these devices consist of a crank 38 attached to the stem ofl cock from crank 38I`to the long end of lever 40 which is fulcrumed at pivot 41 and whose-short end is articulated with o ne end'of a shifter 42.

The shifter 42 may move or slide in a'd0ve tailed groove of a support 43 which is fastened on and surrounds the' sleeve bearing 18 as shown in Figs. 2 and 3. Afsmall roller 44, rotatablegon a stud disposed on the end of the 'shifter 42 and on that side thereof facing shaft 17, projects .into a groove '45, of rectangular cross-section, '(r1- circling a sleeve 46 near one of its ends as shown in perspective by- Fig. 10..- The sleeve 46 is slidablymovable lengthwise on the shaft 17 but its circumferential position.

is xed with relation thereto by means of a studv 47 which is fixed .in Va collar '48 hthat surrounds and is fixed to revolve with shaft 17 as sh'own ,in Figs. 2'and 4 andwhich stud 47 projects outwardly fromsaid collar 48 A into a longitudinal slot 49 made in sleeve 46 as shown in movement of sleeve 46 acts to move shifter outwardly 42 which, through lever 40, connecting rod 39 and crank 38, "controls the cock 37.

A sleeve 50, on which i's mounted a driving sprocket wheel 51, as shown in Fig. 11 is inovably disposed on and near the end of shaft 17, as shown in Fig. 8, where a lengthwise movement on shaft 17 is prevented by a pinl 52 which extends diametrically through shaft 17 and projects from each side thereof through an elongated hole 53 in sleeve 50 which hole 53 permits sleeve 50 to move circumferentially about shaft 17 for a distance which is limited by the length of holes 53.

As seen in Fig. 8 the sleeve 5() projects within the annular space between the sleeve 46 and shaft 17 and a stud or pin 56 projects from each side of sleeve through an elongated diagonally disposed hole 54 in each side of sleeve 46 which holes are. shown more clearly in Fig. 10.

As seen in Fig. 2 there is an annular recess or space between shaft 17 and the sleeve 50, and within such space a suitable spiral spring 55 is disposed around shaft 17, one end of which is attached to sleeve 50 while its other end is fastened to collar 48 whereby its torsional tension may be .set to cause a Acam-like action between the sides of the holes 54 and pins 56 which cam-like action serves to cause the longitudinal motion of sleeve 46 which controls cock 37 through shifter 42, rod 39 and crank 38. y f

Obviously, a pump embodying my invention as described may eiiciently be employed for pumping various liquids or gaseous fluids. For instance, such pump is particularly adapted to serve as a vacuum pump in the work of cleaning or sweeping carpets, rugs and'loors by the vacuum process well known. In 1such instance the hose pipe, to which a cleaning tool is'connected would be connected with pipe 14 leading to inlet 22 of the pump, and outlet 23 would be connected with a waste pipe or sewer while pipe 36 would be connected with a source of water supply7 whereupon motive power wo ld y be applied to sprocket drive wheel 51 tfturn shaft. 17 in a direction indi/cated by arrow in Fig. 1 which would cause the force of spring 55 to be overcome, whereupon sleeve 46 wouldmove shifter 42 to operate cock 37 thereby letting water into cylinder 20, some of Iwhich water would lill up and pack any `crevice existing between the surfaces of rotor 16 and the wall and heads of cylinder 2Q, then the continued rotation of rotor 16 with its vane' 26 would suck the dusty air through inlet 22 from a cleaning tool, which dusty air would mix with the water from pipe 36 and then be ejected throigh outlet 23 into the waste pipe or sewer. bviously quite large pieces of foreign matter might be drawn into the cylindery through inlet 22 without affecting the proper operation of the pump since rollers 27 may repeatedly roll over obstructions until such obstructions are ejected through outlet 23.

Having thus described the construction and operation of my invention what I claim is:

1. In a rotary pump of the'elass described,

the combination with a rotary pump cylinder, whose circumferential wall is provided with an inlet passage for air and with an outlet passage for air mixed with liquid, of a hollow cylindrical' rotor one end of which is open, said rotor being adapted to rotate within said cylinder and disposed therein with its axis'parallel with the axis of the boring of said cylinder to restrict the passage of fluid between the periphery of said rotor and the circumferential wall of said outlet at a longitudinal line located between said inlet Ipassage and saidl outlet. passage, an inlet passage for liquid disposed in one of the heads` of said'pump cylinder to admit liquid into the open end of said rotor, a vane associated with said rotor and adapted to move endwise across said rotors axis said vane being provided of itsends, a roller of suitable material disposed in said slot of each of said ends of said vane, lsaid vane being provided with longitudinal holes leading from the bottom of said slots to passages communicating with the interior of said rotpr whereby liq uid may find passage from said interior to said slots to force said roller to hug the circumferential wall of. said cylinder during rotation of said rotor, and means4 for maintaining an equal distance between the axis with a slot iii each' of the boring of said cylinder and each end V in combination with automatic means assoshaft whereby said stop-cock is operated in response to thestarting and stopping of the operation of the pu?.

, JOHN T ORSEN SEAMAN.

Witnesses:

W. W. CLARK,

ROGER WARD Sno'rwnu...

ciated with Lsaid stop-cock and said driying 120 cylinder through an inlet, 

